Submission #1173884

#	Time	Username	Problem	Language	Result	Execution time	Memory
1173884		stdfloat	이상한 기계 (APIO19_strange_device)	C++20	0 / 100	3966 ms	589824 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;

using ll = long long;

int main() {
	ios::sync_with_stdio(false); cin.tie(nullptr);

	int n;
	ll A, B;
	cin >> n >> A >> B;

	int L;
	set<pair<ll, ll>> s;
	for (int i = 0; ; i++) {
		ll x = (i + i / B) % A, y = i % B;
		
		if (s.find({x, y}) != s.end()) {
			L = i;
			break;
		}

		s.insert({x, y});
	}

	vector<int> p(L);
	while (n--) {
		ll l, r;
		cin >> l >> r;

		if (L <= r - l + 1) return cout << L, 0;

		p[l % L]++;
		p[r % L + 1]--;

		if (r % L < l % L) p[0]++;
	}

	int cnt = 0;
	for (int i = 1; i < L; i++) {
		p[i] += p[i - 1];
		cnt += !!p[i];
	}

	cout << cnt;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30